论文标题
使用飞行时间技术对量子结构太阳能电池中载体 - 传输动力学的微观观察
Microscopic observation of carrier-transport dynamics in quantum-structure solar cells using a time-of-flight technique
论文作者
论文摘要
在这项研究中，我们提出了一种飞行时间，以评估太阳能电池活跃区域中量子结构的载体运输时间。通过观察在正向偏置处的量子结构下插入的量子孔探针的时间分辨光致发光信号，可以在室温下有效确定载流子运输时间。平均漂移速度显示对内部场的线性依赖性，使我们能够将量子结构估计为具有较低有效迁移率的准灯泡材料，其中包含载体动力学的信息。我们表明，这种直接和实时的观察比其他常规技术更敏感载体运输，从而为微观载体传输动力学提供了更好的见解，以克服设备设计的难度。
In this study, we propose a carrier time-of-flight technique to evaluate the carrier transport time across a quantum structure in an active region of solar cells. By observing the time-resolved photoluminescence signal with a quantum-well probe inserted under the quantum structure at forward bias, the carrier transport time can be efficiently determined at room temperature. The averaged drift velocity shows linear dependence on the internal field, allowing us to estimate the quantum structure as a quasi-bulk material with low effective mobility containing the information of carrier dynamics. We show that this direct and real-time observation is more sensitive to carrier transport than other conventional techniques, providing better insights into microscopic carrier transport dynamics to overcome a device design difficulty.
